Is there a Perl equivalent to Python's `if __name__ == '__main__'`?
unless (caller) { print "This is the script being executed\n";}See caller. It returns undef in the main script. Note that that doesn't work inside a subroutine, only in top-level code.
See the "Subclasses for Applications (Chapter 18)" portion of brian d foy's article Five Ways to Improve Your Perl Programming.
unless caller is good, but a more direct parallel, as well as a more explicit check, is:
use English qw<$PROGRAM_NAME>;if ( $PROGRAM_NAME eq __FILE__ ) { ...}Just thought I'd put that out there.
EDIT
Keep in mind that $PROGRAM_NAME (or '$0') is writable, so this is not absolute. But, in most practice--except on accident, or rampaging modules--this likely won't be changed, or changed at most locally within another scope.